Fig. 5From: Vascular endothelial growth factor expression and their action in the synovial membranes of patients with painful knee osteoarthritisEffect of VEGF on apelin protein expression. Western blotting analysis for apelin. Synovial membrane cells were stimulated with 10 or 100 ng/mL human recombinant VGEF or vehicle for 24 h preceding protein extraction and analysis of apelin protein. a Western blot of apelin and β-actin. b Densitometric analysis of apelin bands. All data are shown as the mean ± standard error (n = 6). *P < 0.05 compared with the vehicle controlBack to article page